In recent years, as our deepening understanding of the delicate complexity of the universe continues unabated, Naturalists are increasingly turning to "multiverse" hypotheses to blunt or dodge the force of fine-tuning and teleological arguments for the existence of a Designer. Roughly, the idea is that, parallel to the universe we inhabit, there exists an infinite series of universes, each of which is different from our own in at least one respect. In the multiverse, every contingent possibility is instantiated in at least one universe. If it helps, the concept has been used for dramatic effect on the TV show, Sliders, and in The Hitchhikers Guide to the Galaxy. The multiverse is thought to undercut design arguments because while it is wildly improbable that our life-supporting universe should exist if there was only one shot at it, it is inevitable that our universe exist if every possible universe exists. (Yes, it begs the question of the necessary conditions for this meta-universe, but we'll leave that to the side.) There are mixed feelings about the multiverse hypothesis amongst skeptics and Naturalists. While it may be a stopgap against the implications of our apparently designed universe, it is an inescapably ironic move for the Naturalist to postulate a deus ex machina that is unobserved and, in principle, unobservable.

Our willingness to accept scientific claims that are against common sense is the key to an understanding of the real struggle between science and the supernatural. We take the side of science in spite of the patent absurdity of some of its constructs, in spite of its failure to fulfill many of its extravagant promises of health and life, in spite of the tolerance of the scientific community for unsubstantiated just-so stories, because we have a prior commitment, a commitment to materialism. It is not that the methods and institutions of science somehow compel us to accept a material explanation of the phenomenal world, but, on the contrary, that we are forced by our a priori adherence to material causes to create an apparatus of investigation and a set of concepts that produce material explanations, no matter how counterintuitive, no matter how mystifying to the uninitiated. Moreover, that materialism is absolute, for we cannot allow a Divine Foot in the door.

Darwinists took the wrong view of science because they were infected with the craving to be right. Their scientific colleagues have allowed them to get away with pseudoscientific practices primarily because most scientists do not understand that there is a difference between the scientific method of inquiry, as articulated by Popper, and the philosophical program of scientific naturalism. One reason that they are not inclined to recognize the difference is that they fear the growth of religious fanaticism if the power of naturalistic philosophy is weakened. But whenever science is enlisted in some other cause — religious, political, or racialistic — the result is always that the scientists themselves become fanatics. Scientists see this clearly when they think about the mistakes of their predecessors, but they find it hard to believe that their colleagues could be making the same mistakes today.